/*
    SPDX-FileCopyrightText: 2000-2003 Michael Edwardes <mte@users.sourceforge.net>
    SPDX-FileCopyrightText: 2001-2002 Felix Rodriguez <frodriguez@users.sourceforge.net>
    SPDX-FileCopyrightText: 2002-2004 Kevin Tambascio <ktambascio@users.sourceforge.net>
    SPDX-FileCopyrightText: 2004-2005 Ace Jones <acejones@users.sourceforge.net>
    SPDX-FileCopyrightText: 2006-2020 Thomas Baumgart <tbaumgart@kde.org>
    SPDX-FileCopyrightText: 2006 Darren Gould <darren_gould@gmx.de>
    SPDX-FileCopyrightText: 2017-2018 Łukasz Wojniłowicz <lukasz.wojnilowicz@gmail.com>
    SPDX-License-Identifier: GPL-2.0-or-later
*/

#ifndef MYMONEYFILE_H
#define MYMONEYFILE_H

// ----------------------------------------------------------------------------
// QT Includes

#include <QObject>

// ----------------------------------------------------------------------------
// Project Includes
#include "kmm_mymoney_export.h"
#include "mymoneyunittestable.h"

/**
  * @author Thomas Baumgart, Michael Edwardes, Kevin Tambascio, Christian Dávid
  */

/**
  * This class represents the interface to the MyMoney engine.
  * For historical reasons it is still called MyMoneyFile.
  * It is implemented using the singleton pattern and thus only
  * exists once for each running instance of an application.
  *
  * The instance of the MyMoneyFile object is accessed as follows:
  *
  * @code
  * MyMoneyFile *file = MyMoneyFile::instance();
  * file->anyMemberFunction();
  * @endcode
  *
  * The first line of the above code creates a unique MyMoneyFile
  * object if it is called for the first time ever. All subsequent
  * calls to this functions return a pointer to the object created
  * during the first call.
  *
  * As the MyMoneyFile object represents the business logic, a storage
  * manager must be attached to it. This mechanism allows to use different
  * access methods to store the objects. The interface to access such an
  * storage manager is defined in the class MyMoneyStorageMgr. The methods
  * attachStorage() and detachStorage() are used to attach/detach a
  * storage manager object. The following code can be used to create a
  * functional MyMoneyFile instance:
  *
  * @code
  * MyMoneyStorageMgr *storage = ....
  * MyMoneyFile *file = MyMoneyFile::instance();
  * file->attachStorage(storage);
  * @endcode
  *
  * The methods addAccount(), modifyAccount() and removeAccount() implement the
  * general account maintenance functions. The method reparentAccount() is
  * available to move an account from one superordinate account to another.
  * account() and accountList() are used to retrieve a single instance or a
  * QList of MyMoneyAccount objects.
  *
  * The methods addInstitution(), modifyInstitution() and removeInstitution()
  * implement the general institution maintenance functions. institution() and
  * institutionList() are used to retrieve a single instance or a
  * QList of MyMoneyInstitution objects.
  *
  * The methods addPayee(), modifyPayee() and removePayee()
  * implement the general payee maintenance functions.
  * payee() and payeeList() are used to retrieve a single instance or a
  * QList of MyMoneyPayee objects.
  *
  * The methods addTag(), modifyTag() and removeTag()
  * implement the general tag maintenance functions.
  * tag() and tagList() are used to retrieve a single instance or a
  * QList of MyMoneyTag objects.
  *
  * The methods addTransaction(), modifyTransaction() and removeTransaction()
  * implement the general transaction maintenance functions.
  * transaction() and transactionList() are used to retrieve
  * a single instance or a QList of MyMoneyTransaction objects.
  *
  * The methods addSecurity(), modifySecurity() and removeSecurity()
  * implement the general access to equities held in the engine.
  *
  * The methods addCurrency(), modifyCurrency() and removeCurrency()
  * implement the general access to multiple currencies held in the engine.
  * The methods baseCurrency() and setBaseCurrency() allow to retrieve/set
  * the currency selected by the user as base currency. If a currency
  * reference is empty, it will usually be interpreted as baseCurrency().
  *
  * The methods liability(), asset(), expense(), income() and equity() are
  * used to retrieve the five standard accounts. isStandardAccount()
  * checks if a given accountId references one of the or not.
  * setAccountName() is used to specify a name for the standard accounts
  * from the GUI.
  *
  * The MyMoneyFile object emits the dataChanged() signal when data
  * has been changed.
  *
  * For arbitrary values that have to be stored with the storage object
  * but are of importance to the application only, the object is derived
  * for MyMoneyKeyValueContainer which provides a container to store
  * these values indexed by an alphanumeric key.
  *
  * @exception MyMoneyException is thrown whenever an error occurs
  * while the engine code is running. The MyMoneyException:: object
  * describes the problem.
  */
template <class Key, class T> class QMap;
class QString;
class QStringList;
class QBitArray;
class QUndoStack;
class MyMoneyStorageMgr;
class MyMoneyCostCenter;
class MyMoneyAccount;
class MyMoneyInstitution;
class MyMoneySecurity;
class MyMoneyPrice;
typedef QPair<QString, QString> MyMoneySecurityPair;
typedef QMap<QDate, MyMoneyPrice> MyMoneyPriceEntries;
typedef QMap<MyMoneySecurityPair, MyMoneyPriceEntries> MyMoneyPriceList;
class MyMoneySchedule;
class MyMoneyTag;
class MyMoneyPayee;
class MyMoneyBudget;
class MyMoneyReport;
class MyMoneyMoney;
class MyMoneySplit;
class MyMoneyObject;
class MyMoneyTransaction;
class MyMoneyTransactionFilter;
class onlineJob;

// the models
class PayeesModel;
class CostCenterModel;
class SchedulesModel;
class TagsModel;
class SecuritiesModel;
class BudgetsModel;
class AccountsModel;
class InstitutionsModel;
class JournalModel;
class PriceModel;
class ParametersModel;
class OnlineJobsModel;
class ReportsModel;
class MyMoneyModelBase;

// non permanent models
class ReconciliationModel;
class SpecialDatesModel;
class SchedulesJournalModel;
class StatusModel;
/// @note add new models here

namespace eMyMoney {
namespace Account {
enum class Type;
}
namespace File {
enum class Object;
}
namespace Schedule {
enum class Type;
enum class Occurrence;
enum class PaymentType;
}
namespace TransactionFilter {
enum class State;
}
}


class KMM_MYMONEY_EXPORT MyMoneyFile : public QObject
{
    Q_OBJECT
    KMM_MYMONEY_UNIT_TESTABLE

public:
    friend class MyMoneyNotifier;

    typedef enum {
        CreationDate,
        LastModificationDate,
        FileFixVersion,
        UserID,
    } FixedKey;

    /**
      * This is the function to access the MyMoneyFile object.
      * It returns a pointer to the single instance of the object.
      */
    static MyMoneyFile* instance();

    /**
      * This is the destructor for any MyMoneyFile object
      */
    ~MyMoneyFile();

    static MyMoneyModelBase* baseModel();

    /**
     * This returns the currently implemented highest fix version
     */
    constexpr static int availableFixVersion() {
        return 5;
    }

    /**
     * returns the current file fix version of the loaded data
     *
     * @sa setFileFixVersion(), availableFixVersion()
     */
    int fileFixVersion() const;

    /**
     * Sets the file fix level to @a version
     *
     * @sa fileFixVersion(), availableFixVersion()
     */
    void setFileFixVersion(int version);

    // general get functions
    MyMoneyPayee user() const;

    // general set functions
    void setUser(const MyMoneyPayee& user);

    /**
      * This method is used to attach a storage object to the MyMoneyFile object
      * Without an attached storage object, the MyMoneyFile object is
      * of no use.
      *
      * After successful completion, the dataChanged() signal is emitted.
      *
      * In case of an error condition, an exception is thrown.
      * The following error conditions are checked:
      *
      * - @a storage is not equal to 0
      * - there is no other @a storage object attached (use detachStorage()
      *   to revert the attachStorage() operation.
      *
      * @param storage pointer to object that implements the MyMoneyStorageMgr
      *                interface.
      *
      * @sa detachStorage()
      */
    void attachStorage(MyMoneyStorageMgr* const storage);

    /**
      * This method is used to detach a previously attached storage
      * object from the MyMoneyFile object. If no storage object
      * is attached to the engine, this is a NOP.
      *
      * @param storage pointer to object that implements the MyMoneyStorageMgr
      *                interface.
      *
      * @sa attachStorage()
      */
    void detachStorage(MyMoneyStorageMgr* const storage = 0);

    /**
      * This method returns whether a storage is currently attached to
      * the engine or not.
      *
      * @return true if storage object is attached, false otherwise
      */
    bool storageAttached() const;

    /**
      * This method returns a pointer to the storage object
      *
      * @return const pointer to the current attached storage object.
      *         If no object is attached, returns 0.
      */
    // MyMoneyStorageMgr* storage() const;

    /**
     * This method clears all data in all storage models
     */
    void unload();

    /**
      * This method must be called before any single change or a series of changes
      * in the underlying storage area is performed.
      * Once all changes are complete (i.e. the transaction is completed),
      * commitTransaction() must be called to finalize all changes. If an error occurs
      * during the processing of the changes call rollbackTransaction() to undo the
      * changes done so far.
      *
      * The @a undoActionText will be attached to the transaction
      */
    void startTransaction(const QString& undoActionText = QString());

    /**
      * This method returns whether a transaction has been started (@a true)
      * or not (@a false).
      */
    bool hasTransaction() const;

    /**
      * @sa startTransaction()
      */
    void commitTransaction();

    /**
      * @sa startTransaction()
      */
    void rollbackTransaction();

    /**
      * This method is used to return the standard liability account
      * @return MyMoneyAccount liability account(group)
      */
    MyMoneyAccount liability() const;

    /**
      * This method is used to return the standard asset account
      * @return MyMoneyAccount asset account(group)
      */
    MyMoneyAccount asset() const;

    /**
      * This method is used to return the standard expense account
      * @return MyMoneyAccount expense account(group)
      */
    MyMoneyAccount expense() const;

    /**
      * This method is used to return the standard income account
      * @return MyMoneyAccount income account(group)
      */
    MyMoneyAccount income() const;

    /**
      * This method is used to return the standard equity account
      * @return MyMoneyAccount equity account(group)
      */
    MyMoneyAccount equity() const;

    /**
      * This method returns the account information for the opening
      * balances account for the given @p security. If the respective
      * account does not exist, it will be created. The name is constructed
      * using MyMoneyFile::openingBalancesPrefix() and appending " (xxx)" in
      * case the @p security is not the baseCurrency(). The account created
      * will be a sub-account of the standard equity account provided by equity().
      *
      * @param security Security for which the account is searched
      *
      * @return The opening balance account
      *
      * @note No notifications will be sent!
      */
    MyMoneyAccount openingBalanceAccount(const MyMoneySecurity& security);

    /**
      * This method is essentially the same as the above, except it works on
      * const objects.  If there is no opening balance account, this method
      * WILL NOT create one.  Instead it will thrown an exception.
      *
      * @param security Security for which the account is searched
      *
      * @return The opening balance account
      *
      * @note No notifications will be sent!
      */
    MyMoneyAccount openingBalanceAccount(const MyMoneySecurity& security) const;

    /**
      * Create an opening balance transaction for the account @p acc
      * with a value of @p balance. If the corresponding opening balance account
      * for the account's currency does not exist it will be created. If it exists
      * and it's opening date is later than the opening date of @p acc,
      * the opening date of the opening balances account will be adjusted to the
      * one of @p acc.
      *
      * @param acc reference to account for which the opening balance transaction
      *            should be created
      * @param balance reference to the value of the opening balance transaction
      *
      * @returns The created MyMoneyTransaction object. In case no transaction has been
      *          created, the id of the object is empty.
      */
    MyMoneyTransaction createOpeningBalanceTransaction(const MyMoneyAccount& acc, const MyMoneyMoney& balance);

    /**
      * Retrieve the opening balance transaction for the account @p acc.
      * If there is no opening balance transaction, QString() will be returned.
      *
      * @param acc reference to account for which the opening balance transaction
      *            should be retrieved
      * @return QString id for the transaction, or QString() if no transaction exists
      */
    QString openingBalanceTransaction(const MyMoneyAccount& acc) const;

    /**
      * This method returns an indicator if the MyMoneyFile object has been
      * changed after it has last been saved to permanent storage.
      *
      * @return true if changed, false if not
      */
    bool dirty() const;

    /**
      * This method is used to force the attached storage object to
      * be dirty. This is used by the application to re-set the dirty
      * flag after a failed upload to a server when the save operation
      * to a local temp file was OK.
      */
    void setDirty(bool dirty = true) const;

    /**
      * Adds an institution to the file-global institution pool. A
      * respective institution-ID will be generated for this object.
      * The ID is stored as QString in the object passed as argument.
      *
      * An exception will be thrown upon error conditions.

      * @param institution The complete institution information in a
      *        MyMoneyInstitution object
      */
    void addInstitution(MyMoneyInstitution& institution);

    /**
      * Modifies an already existing institution in the file global
      * institution pool.
      *
      * An exception will be thrown upon error conditions.
      *
      * @param institution The complete new institution information
      */
    void modifyInstitution(const MyMoneyInstitution& institution);

    /**
      * Deletes an existing institution from the file global institution pool
      * Also modifies the accounts that reference this institution as
      * their institution.
      *
      * An exception will be thrown upon error conditions.
      *
      * @param institution institution to be deleted.
      */
    void removeInstitution(const MyMoneyInstitution& institution);

    void createAccount(MyMoneyAccount& newAccount, MyMoneyAccount& parentAccount, MyMoneyAccount& brokerageAccount, MyMoneyMoney openingBal);
    /**
      * Adds an account to the file-global account pool. A respective
      * account-ID will be generated within this record. The modified
      * members of @a account will be updated.
      *
      * A few parameters of the account to be added are checked against
      * the following conditions. If they do not match, an exception is
      * thrown.
      *
      * An account must match the following conditions:
      *
      *   a) the account must have a name with length > 0
      *   b) the account must not have an id assigned
      *   c) the transaction list must be empty
      *   d) the account must not have any sub-ordinate accounts
      *   e) the account must have no parent account
      *   f) the account must not have any reference to a MyMoneyFile object
      *
      * An exception will be thrown upon error conditions.
      *
      * @param account The complete account information in a MyMoneyAccount object
      * @param parent  The complete account information of the parent account
      */
    void addAccount(MyMoneyAccount& account, MyMoneyAccount& parent);

    /**
      * Modifies an already existing account in the file global account pool.
      *
      * An exception will be thrown upon error conditions.
      *
      * @param account reference to the new account information
      */
    void modifyAccount(const MyMoneyAccount& account);

    /**
      * This method re-parents an existing account
      *
      * An exception will be thrown upon error conditions.
      *
      * @param account MyMoneyAccount reference to account to be re-parented
      * @param parent  MyMoneyAccount reference to new parent account
      */
    void reparentAccount(MyMoneyAccount &account, MyMoneyAccount& parent);

    /**
      * moves splits from one account to another
      *
      * @param oldAccount id of the current account
      * @param newAccount if of the new account
      *
      * @return the number of modified splits
      */
    unsigned int moveSplits(const QString& oldAccount, const QString& newAccount);

    /**
      * This method is used to determine, if the account with the
      * given ID is referenced by any split in m_transactionList.
      *
      * @param id id of the account to be checked for
      * @return true if account is referenced, false otherwise
      */
    bool hasActiveSplits(const QString& id) const;

    /**
      * This method is used to check whether a given
      * account id references one of the standard accounts or not.
      *
      * An exception will be thrown upon error conditions.
      *
      * @param id account id
      * @return true if account-id is one of the standards, false otherwise
      */
    bool isStandardAccount(const QString& id) const;

    /**
      * Returns @a true, if transaction @p t is a transfer transaction.
      * A transfer transaction has two splits, both referencing either
      * an asset, a liability or an equity account.
      */
    bool isTransfer(const MyMoneyTransaction& t) const;

    /**
     * Return @a true if transaction @a t is an investment transaction.
     * A transaction is called an investment transaction if at least
     * one split references an investment account and one split
     * references an account denoted in an investment security.
     */
    bool isInvestmentTransaction(const MyMoneyTransaction& t) const;

    /**
      * Deletes an existing account from the file global account pool
      * This method only allows to remove accounts that are not
      * referenced by any split. Use moveSplits() to move splits
      * to another account. An exception is thrown in case of a
      * problem.
      *
      * @param account reference to the account to be deleted.
      */
    void removeAccount(const MyMoneyAccount& account);

    /**
      * Deletes existing accounts and their subaccounts recursively
      * from the global account pool.
      * This method expects that all accounts and their subaccounts
      * are no longer assigned to any transactions or splits.
      * An exception is thrown in case of a problem deleting an account.
      *
      * The optional parameter level is used to keep track of the recursion level.
      * If the recursion level exceeds 100 (some arbitrary number which seems a good
      * maximum), an exception is thrown.
      *
      * @param account_list Reference to a list of account IDs to be deleted.
      * @param level Parameter to keep track of recursion level (do not pass a value here).
      */
    void removeAccountList(const QStringList& account_list, unsigned int level = 0);

    /**
      * This member function checks all accounts identified by account_list
      * and their subaccounts whether they are assigned to transactions/splits or not.
      * The function calls itself recursively with the list of sub-accounts of
      * the currently processed account.
      *
      * The optional parameter level is used to keep track of the recursion level.
      * If the recursion level exceeds 100 (some arbitrary number which seems a good
      * maximum), an exception is thrown.
      *
      * @param account_list  A QStringList with account IDs that need to be checked.
      * @param level         (optional) Optional parameter to indicate recursion level.
      * @return              Returns 'false' if at least one account has been found that
      *                      is still referenced by a transaction.
      */
    bool hasOnlyUnusedAccounts(const QStringList& account_list, unsigned int level = 0);

    /**
      * Adds a transaction to the file-global transaction pool. A respective
      * transaction-ID will be generated for this object. The ID is stored
      * as QString in the object passed as argument.
      * Splits must reference valid accounts and valid payees. The payee
      * id can be empty.
      *
      * An exception will be thrown upon error conditions.
      *
      * @param transaction reference to the transaction
      */
    void addTransaction(MyMoneyTransaction& transaction);

    /**
      * This method is used to update a specific transaction in the
      * transaction pool of the MyMoneyFile object.
      * Splits must reference valid accounts and valid payees. The payee
      * id can be empty.
      *
      * An exception will be thrown upon error conditions.
      *
      * @param transaction reference to transaction to be changed
      */
    void modifyTransaction(const MyMoneyTransaction& transaction);

    /**
      * This method is used to extract a transaction from the file global
      * transaction pool through an id. In case of an invalid id, an
      * exception will be thrown.
      *
      * @param id id of transaction as QString.
      * @return reference to the requested transaction
      */
    MyMoneyTransaction transaction(const QString& id) const;

    /**
      * This method is used to extract a transaction from the file global
      * transaction pool through an index into an account.
      *
      * @param account id of the account as QString
      * @param idx number of transaction in this account
      * @return reference to MyMoneyTransaction object
      */
    MyMoneyTransaction transaction(const QString& account, const int idx) const;

    QStringList journalEntryIds(MyMoneyTransactionFilter filter) const;

    /**
     * This method is used to pull a list of transactions from the file
     * global transaction pool. It returns all those transactions
     * that match the filter passed as argument. If the filter is empty,
     * the whole journal will be returned.
     * The list returned is sorted according to the transactions posting date.
     * If more than one transaction exists for the same date, the order among
     * them is undefined.
     *
     * @param list Reference to QList receiving the matching transactions
     * @param filter MyMoneyTransactionFilter object with the match criteria
     */
    void transactionList(QList<MyMoneyTransaction>& list, MyMoneyTransactionFilter& filter) const;

    void transactionList(QList<QPair<MyMoneyTransaction, MyMoneySplit> >& list, MyMoneyTransactionFilter& filter) const;

    /**
      * This method is used to remove a transaction from the transaction
      * pool (journal).
      *
      * @param transaction const reference to transaction to be deleted
      */
    void removeTransaction(const MyMoneyTransaction& transaction);

    /**
      * This method is used to return the actual balance of an account
      * without it's sub-ordinate accounts. If a @p date is presented,
      * the balance at the beginning of this date (not including any
      * transaction on this date) is returned. Otherwise all recorded
      * transactions are included in the balance.
      *
      * @param id id of the account in question
      * @param date return balance for specific date (default = QDate())
      * @return balance of the account as MyMoneyMoney object
      */
    MyMoneyMoney balance(const QString& id, const QDate& date) const;
    MyMoneyMoney balance(const QString& id) const;

    /**
      * This method is used to return the cleared balance of an account
      * without it's sub-ordinate accounts for a specific date. All
      * recorded  transactions are included in the balance.
      * This method is used by the reconciliation functionality
      *
      * @param id id of the account in question
      * @param date return cleared balance for specific date
      * @return balance of the account as MyMoneyMoney object
      */
    MyMoneyMoney clearedBalance(const QString& id, const QDate& date) const;


    /**
      * This method is used to return the actual balance of an account
      * including it's sub-ordinate accounts. If a @p date is presented,
      * the balance at the beginning of this date (not including any
      * transaction on this date) is returned. Otherwise all recorded
      * transactions are included in the balance.
      *
      * @param id id of the account in question
      * @param date return balance for specific date (default = QDate())
      * @return balance of the account as MyMoneyMoney object
      */
    MyMoneyMoney totalBalance(const QString& id, const QDate& date) const;
    MyMoneyMoney totalBalance(const QString& id) const;

    /**
      * This method returns the number of transactions currently known to file
      * in the range 0..MAXUINT
      *
      * @param accountId QString reference to account id. If account is empty
      +                  all transactions (the journal) will be counted. If account
      *                  is not empty it returns the number of transactions
      *                  that have splits in this account.
      *
      * @return number of transactions in journal/account
      */
    unsigned int transactionCount(const QString& accountId = QString()) const;

    /**
      * This method returns the number of institutions currently known to file
      * in the range 0..MAXUINT
      *
      * @return number of institutions known to file
      */
    unsigned int institutionCount() const;

    /**
      * This method returns the number of accounts currently known to file
      * in the range 0..MAXUINT
      *
      * @return number of accounts currently known inside a MyMoneyFile object
      */
    unsigned int accountCount() const;

    /**
      * Returns the institution of a given ID
      *
      * @param id id of the institution to locate
      * @return MyMoneyInstitution object filled with data. If the institution
      *         could not be found, an exception will be thrown
      */
    MyMoneyInstitution institution(const QString& id) const;

    /**
      * This method returns a list of the institutions
      * inside a MyMoneyFile object. This is a convenience method
      * to the one above
      *
      * @return QList containing the institution objects
      */
    QList<MyMoneyInstitution> institutionList() const;

    /**
      * Returns the account addressed by its id.
      *
      * @param id id of the account to locate.
      * @return MyMoneyAccount object carrying the @p id. An exception is thrown
      *         if the id is unknown
      */
    MyMoneyAccount account(const QString& id) const;

    /**
     * Returns the account addressed by its name.
     *
     * @param name  name of the account to locate.
     * @return First MyMoneyAccount object found carrying the @p name.
     * An empty MyMoneyAccount object will be returned if the name is not found.
     */
    MyMoneyAccount accountByName(const QString& name) const;

    /**
     * Returns the sub-account addressed by its name.
     *
     * @param acc account to search in
     * @param name  name of the account to locate.
     * @return First MyMoneyAccount object found carrying the @p name.
     * An empty MyMoneyAccount object will be returned if the name is not found.
     */
    MyMoneyAccount subAccountByName(const MyMoneyAccount& account, const QString& name) const;

    /**
      * This method returns a list of accounts inside a MyMoneyFile object.
      * An optional parameter is a list of id's. If this list is empty (the default)
      * the returned list contains all accounts, otherwise only those referenced
      * in the id-list.
      *
      * @param list reference to QList receiving the account objects
      * @param idlist QStringList of account ids of those accounts that
      *        should be returned. If this list is empty, all accounts
      *        currently known will be returned.
      *
      * @param recursive if @p true, then recurse in all found accounts. The default is @p false
      */
    void accountList(QList<MyMoneyAccount>& list, const QStringList& idlist = QStringList(), const bool recursive = false) const;

    /**
      * This method is used to convert an account id to a string representation
      * of the names which can be used as a category description. If the account
      * is part of a hierarchy, the category name will be the concatenation of
      * the single account names separated by MyMoneyFile::AccountSeparator.
      *
      * @param accountId QString reference of the account's id
      * @param includeStandardAccounts if true, the standard top account will be part
      *                   of the name, otherwise it will not be included (default is @c false)
      *
      * @return QString of the constructed name.
      */
    QString accountToCategory(const QString& accountId, bool includeStandardAccounts = false) const;

    /**
      * This method is used to convert a string representing a category to
      * an account id. A category can be the concatenation of multiple accounts
      * representing a hierarchy of accounts. They have to be separated by
      * MyMoneyFile::AccountSeparator.
      *
      * @param category const reference to QString containing the category
      * @param type account type if a specific type is required (defaults to Unknown)
      *
      * @return QString of the corresponding account. If account was not found
      *         the return value will be an empty string.
      */
    QString categoryToAccount(const QString& category, eMyMoney::Account::Type type) const;
    QString categoryToAccount(const QString& category) const;

    /**
      * This method is used to convert a string representing an asset or
      * liability account to an account id. An account name can be the
      * concatenation of multiple accounts representing a hierarchy of
      * accounts. They have to be separated by MyMoneyFile::AccountSeparator.
      *
      * @param name const reference to QString containing the account name
      *
      * @return QString of the corresponding account. If account was not found
      *         the return value will be an empty string.
      */
    QString nameToAccount(const QString& name) const;

    /**
      * This method is used to extract the parent part of an account hierarchy
      * name who's parts are separated by MyMoneyFile::AccountSeparator.
      *
      * @param name full account name
      * @return parent name (full account name excluding the last part)
      */
    QString parentName(const QString& name) const;

    /**
      * This method is used to create a new payee
      *
      * An exception will be thrown upon error conditions
      *
      * @param payee MyMoneyPayee reference to payee information
      */
    void addPayee(MyMoneyPayee& payee);

    /**
      * This method is used to retrieve information about a payee
      * An exception will be thrown upon error conditions.
      *
      * @param id QString reference to id of payee
      *
      * @return MyMoneyPayee object of payee
      */
    MyMoneyPayee payee(const QString& id) const;

    /**
      * This method is used to retrieve the id to a corresponding
      * name of a payee/receiver.
      * An exception will be thrown upon error conditions.
      *
      * @param payee QString reference to name of payee
      *
      * @return MyMoneyPayee object of payee
      */
    MyMoneyPayee payeeByName(const QString& payee) const;

    /**
      * This method is used to modify an existing payee
      *
      * An exception will be thrown upon error conditions
      *
      * @param payee MyMoneyPayee reference to payee information
      */
    void modifyPayee(const MyMoneyPayee& payee);

    /**
      * This method is used to remove an existing payee.
      * An error condition occurs, if the payee is still referenced
      * by a split.
      *
      * An exception will be thrown upon error conditions
      *
      * @param payee MyMoneyPayee reference to payee information
      */
    void removePayee(const MyMoneyPayee& payee);

    /**
      * This method returns a list of the payees
      * inside a MyMoneyStorage object
      *
      * @return QList<MyMoneyPayee> containing the payee information
      */
    QList<MyMoneyPayee> payeeList() const;

    /**
     * The payees model instance
     */
    PayeesModel* payeesModel() const;

    /**
     * The costcenter model instance
     */
    CostCenterModel* costCenterModel() const;

    /**
     * The schedules model instance
     */
    SchedulesModel* schedulesModel() const;

    /**
     * The tags model instance
     */
    TagsModel* tagsModel() const;

    /**
     * The securities model instance
     */
    SecuritiesModel* securitiesModel() const;

    /**
     * The currencies model instance
     */
    SecuritiesModel* currenciesModel() const;

    /**
     * The budgets model instance
     */
    BudgetsModel* budgetsModel() const;

    /**
     * The accounts model instance
     */
    AccountsModel* accountsModel() const;

    /**
     * The institutions model instance
     */
    InstitutionsModel* institutionsModel() const;

    /**
     * The journal model instance
     */
    JournalModel* journalModel() const;

    /**
     * The price model instance
     */
    PriceModel* priceModel() const;

    /**
     * The parameters model instance
     */
    ParametersModel* parametersModel() const;

    /**
     * The online jobs model instance
     */
    OnlineJobsModel* onlineJobsModel() const;

    /**
     * The reports model instance
     */
    ReportsModel* reportsModel() const;

    /**
     * The user model instance
     */
    PayeesModel* userModel() const;

    /**
     * The user model instance
     */
    SpecialDatesModel* specialDatesModel() const;

    /**
     * The scheduled transactions as journal entries
     */
    SchedulesJournalModel* schedulesJournalModel() const;

    /*
     * The transaction status model
     */
    StatusModel* statusModel() const;

    /*
     * The reconciliation entry model
     */
    ReconciliationModel* reconciliationModel() const;

    /// @note add new models here

    /**
      * This method is used to create a new tag
      *
      * An exception will be thrown upon error conditions
      *
      * @param tag MyMoneyTag reference to tag information
      */
    void addTag(MyMoneyTag& tag);

    /**
      * This method is used to retrieve information about a tag
      * An exception will be thrown upon error conditions.
      *
      * @param id QString reference to id of tag
      *
      * @return MyMoneyTag object of tag
      */
    MyMoneyTag tag(const QString& id) const;

    /**
      * This method is used to retrieve the id to a corresponding
      * name of a tag.
      * An exception will be thrown upon error conditions.
      *
      * @param tag QString reference to name of tag
      *
      * @return MyMoneyTag object of tag
      */
    MyMoneyTag tagByName(const QString& tag) const;

    /**
      * This method is used to modify an existing tag
      *
      * An exception will be thrown upon error conditions
      *
      * @param tag MyMoneyTag reference to tag information
      */
    void modifyTag(const MyMoneyTag& tag);

    /**
      * This method is used to remove an existing tag.
      * An error condition occurs, if the tag is still referenced
      * by a split.
      *
      * An exception will be thrown upon error conditions
      *
      * @param tag MyMoneyTag reference to tag information
      */
    void removeTag(const MyMoneyTag& tag);

    /**
      * This method returns a list of the tags
      * inside a MyMoneyStorage object
      *
      * @return QList<MyMoneyTag> containing the tag information
      */
    QList<MyMoneyTag> tagList() const;

    /**
      * This method returns a list of the cost centers
      * inside a MyMoneyStorage object
      *
      * @return QList<MyMoneyCostCenter> containing the cost center information
      */
    void costCenterList(QList< MyMoneyCostCenter >& list) const;

    /**
      * This method is used to extract a value from the storage's
      * KeyValueContainer. For details see MyMoneyKeyValueContainer::value().
      * @note Do not use this method to return the value of the key @p kmm-id. Use
      * storageId() instead.
      *
      * @param key const reference to QString containing the key
      * @return QString containing the value
      */
    QString value(const QString& key) const;

    /**
      * This method is used to set a value in the storage's
      * KeyValueContainer. For details see MyMoneyKeyValueContainer::setValue().
      *
      * @param key const reference to QString containing the key
      * @param val const reference to QString containing the value
      *
      * @note Keys starting with the leading @p kmm- are reserved for internal use
      *       by the MyMoneyFile object.
      */
    void setValue(const QString& key, const QString& val);

    /**
     * This method returns the unique id of the attached storage object.
     * In case the storage object does not have an id yet, a new one will be
     * assigned.
     *
     * @return QUuid containing the value
     *
     * An exception is thrown if no storage object is attached.
     */
    QUuid storageId();

    /**
      * This method is used to delete a key-value-pair from the
      * storage's KeyValueContainer identified by the parameter
      * @p key. For details see MyMoneyKeyValueContainer::deletePair().
      *
      * @param key const reference to QString containing the key
      */
    void deletePair(const QString& key);

    /**
      * This method is used to add a scheduled transaction to the engine.
      * It must be sure, that the id of the object is not filled. When the
      * method returns to the caller, the id will be filled with the
      * newly created object id value.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param sched reference to the MyMoneySchedule object
      */
    void addSchedule(MyMoneySchedule& sched);

    /**
      * This method is used to modify an existing MyMoneySchedule
      * object. Therefor, the id attribute of the object must be set.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param sched const reference to the MyMoneySchedule object to be updated
      */
    void modifySchedule(const MyMoneySchedule& sched);

    /**
      * This method is used to remove an existing MyMoneySchedule object
      * from the engine. The id attribute of the object must be set.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param sched const reference to the MyMoneySchedule object to be updated
      */
    void removeSchedule(const MyMoneySchedule& sched);

    /**
      * This method is used to retrieve a single MyMoneySchedule object.
      * The id of the object must be supplied in the parameter @p id.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param id QString containing the id of the MyMoneySchedule object
      * @return MyMoneySchedule object
      */
    MyMoneySchedule schedule(const QString& id) const;

    /**
      * This method is used to extract a list of scheduled transactions
      * according to the filter criteria passed as arguments.
      *
      * @param accountId only search for scheduled transactions that reference
      *                  account @p accountId. If accountId is the empty string,
      *                  this filter is off. Default is @p QString().
      * @param type      only schedules of type @p type are searched for.
      *                  See eMyMoney::Schedule::Type for details.
      *                  Default is eMyMoney::Schedule::Type::Any
      * @param occurrence only schedules of occurrence type @p occurrence are searched for.
      *                  See eMyMoney::Schedule::Occurrence for details.
      *                  Default is eMyMoney::Schedule::Occurrence::Any
      * @param paymentType only schedules of payment method @p paymentType
      *                  are searched for.
      *                  See eMyMoney::Schedule::PaymentType for details.
      *                  Default is eMyMoney::Schedule::PaymentType::Any
      * @param startDate only schedules with payment dates after @p startDate
      *                  are searched for. Default is all dates (QDate()).
      * @param endDate   only schedules with payment dates ending prior to @p endDate
      *                  are searched for. Default is all dates (QDate()).
      * @param overdue   if true, only those schedules that are overdue are
      *                  searched for. Default is false (all schedules will be returned).
      *
      * @return const QList<MyMoneySchedule> list of schedule objects.
      */
    QList<MyMoneySchedule> scheduleList(const QString& accountId,
                                        const eMyMoney::Schedule::Type type,
                                        const eMyMoney::Schedule::Occurrence occurrence,
                                        const eMyMoney::Schedule::PaymentType paymentType,
                                        const QDate& startDate,
                                        const QDate& endDate,
                                        const bool overdue) const;
    QList<MyMoneySchedule> scheduleList(const QString& accountId) const;
    QList<MyMoneySchedule> scheduleList() const;

    /**
     * Returns the transaction for @a schedule. In case of a loan payment the
     * transaction will be modified by calculateAutoLoan().
     * The ID of the transaction as well as the entryDate will be reset.
     *
     * @returns adjusted transaction
     */
    MyMoneyTransaction scheduledTransaction(const MyMoneySchedule& schedule);


    QStringList consistencyCheck();

    /**
      * MyMoneyFile::openingBalancesPrefix() is a special string used
      * to generate the name for opening balances accounts. See openingBalanceAccount()
      * for details.
      */
    static QString openingBalancesPrefix();

    /**
      * MyMoneyFile::AccountSeparator is used as the separator
      * between account names to form a hierarchy.
      */
    static const QString AccountSeparator;

    /**
      * createCategory creates a category from a text name.
      *
      * The whole account hierarchy is created if it does not
      * already exist.  e.g if name = Bills:Credit Card and
      * base = expense(), Bills will first be checked to see if
      * it exists and created if not.  Credit Card will then
      * be created with Bills as it's parent.  The Credit Card account
      * will have it's id returned.
      *
      * @param base The base account (expense or income)
      * @param name The category to create
      *
      * @return The category account id or empty on error.
      *
      * @exception An exception will be thrown, if @p base is not equal
      *            expense() or income().
      **/
    QString createCategory(const MyMoneyAccount& base, const QString& name);

    /**
      * This method is used to get the account id of the split for
      * a transaction from the text found in the QIF $ or L record.
      * If an account with the name is not found, the user is asked
      * if it should be created.
      *
      * @param name name of account as found in the QIF file
      * @param value value found in the T record
      * @param value2 value found in the $ record for split transactions
      *
      * @return id of the account for the split. If no name is specified
      *            or the account was not found and not created the
      *            return value will be "".
      */
    QString checkCategory(const QString& name, const MyMoneyMoney& value, const MyMoneyMoney& value2);

    /**
      * This method is used to add a new security object to the engine.
      * The ID of the object is the trading symbol, so there is no need for an additional
      * ID since the symbol is guaranteed to be unique.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param security reference to the MyMoneySecurity object
      */
    void addSecurity(MyMoneySecurity& security);

    /**
      * This method is used to modify an existing MyMoneySchedule
      * object.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param security reference to the MyMoneySecurity object to be updated
      */
    void modifySecurity(const MyMoneySecurity& security);

    /**
      * This method is used to remove an existing MyMoneySecurity object
      * from the engine.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param security reference to the MyMoneySecurity object to be removed
      */
    void removeSecurity(const MyMoneySecurity& security);

    /**
      * This method is used to retrieve a single MyMoneySecurity object.
      * The id of the object must be supplied in the parameter @p id.
      * If no security with the given id is found, then a corresponding
      * currency is searched. If @p id is empty, the baseCurrency() is returned.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param id QString containing the id of the MyMoneySecurity object
      * @return MyMoneySecurity object
      */
    MyMoneySecurity security(const QString& id) const;

    /**
      * This method is used to retrieve a list of all MyMoneySecurity objects.
      */
    QList<MyMoneySecurity> securityList() const;

    /**
      * This method is used to add a new currency object to the engine.
      * The ID of the object is the trading symbol, so there is no need for an additional
      * ID since the symbol is guaranteed to be unique.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param currency reference to the MyMoneySecurity object
      */
    void addCurrency(const MyMoneySecurity& currency);

    /**
      * This method is used to modify an existing MyMoneySecurity
      * object.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param currency reference to the MyMoneySecurity object
      */
    void modifyCurrency(const MyMoneySecurity& currency);

    /**
      * This method is used to remove an existing MyMoneySecurity object
      * from the engine.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param currency reference to the MyMoneySecurity object
      */
    void removeCurrency(const MyMoneySecurity& currency);

    /**
      * This method is used to retrieve a single MyMoneySecurity object.
      * The id of the object must be supplied in the parameter @p id.
      * If @p id is empty, this method returns baseCurrency(). In case
      * no currency is found, @p id is searched in the loaded set of securities.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param id QString containing the id of the MyMoneySchedule object
      * @return MyMoneySchedule object
      */
    MyMoneySecurity currency(const QString& id) const;

    /**
      * This method is used to retrieve the map of ancient currencies (together with their last prices)
      * known to the engine.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @return QMap of all MyMoneySecurity and MyMoneyPrice objects.
      */
    QMap<MyMoneySecurity, MyMoneyPrice> ancientCurrencies() const;

    /**
      * This method is used to retrieve the list of available currencies
      * known to the engine.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @return QList of all MyMoneySecurity objects.
      */
    QList<MyMoneySecurity> availableCurrencyList() const;

    /**
      * This method is used to retrieve the list of stored currencies
      * known to the engine.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @return QList of all MyMoneySecurity objects.
      */
    QList<MyMoneySecurity> currencyList() const;

    /**
      * This method retrieves a MyMoneySecurity object representing
      * the selected base currency. If the base currency is not
      * selected (e.g. due to a previous call to setBaseCurrency())
      * a standard MyMoneySecurity object will be returned. See
      * MyMoneySecurity() for details.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @return MyMoneySecurity describing base currency
      */
    MyMoneySecurity baseCurrency() const;

    /**
      * This method returns the foreign currency of the given two
      * currency ids. If second is the base currency id then @a first
      * is returned otherwise @a second is returned.
      */
    QString foreignCurrency(const QString& first, const QString& second) const;

    /**
      * This method allows to select the base currency. It does
      * not perform any changes to the data in the engine. It merely
      * stores a reference to the base currency. The currency
      * passed as argument must exist in the engine.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param currency
      */
    void setBaseCurrency(const MyMoneySecurity& currency);

    /**
      * This method adds/replaces a price to/from the price list
      */
    void addPrice(const MyMoneyPrice& price);

    /**
      * This method removes a price from the price list
      */
    void removePrice(const MyMoneyPrice& price);

    /**
      * This method is used to retrieve a price for a specific security
      * on a specific date. If there is no price for this date, the last
      * known price for this currency is used. If no price information
      * is available, 1.0 will be returned as price.
      *
      * @param fromId the id of the currency in question
      * @param toId the id of the currency to convert to (if empty, baseCurrency)
      * @param date the date for which the price should be returned (default = today)
      * @param exactDate if true, entry for date must exist, if false any price information
      *                  with a date less or equal to @p date will be returned
      *
      * @return price found as MyMoneyPrice object
      * @note This throws an exception when the base currency is not set and toId is empty
      */
    MyMoneyPrice price(const QString& fromId, const QString& toId, const QDate& date, const bool exactDate = false) const;
    MyMoneyPrice price(const QString& fromId, const QString& toId) const;
    MyMoneyPrice price(const QString& fromId) const;

    /**
      * This method returns a list of all prices.
      *
      * @return MyMoneyPriceList of all MyMoneyPrice objects.
      */
    MyMoneyPriceList priceList() const;

    /**
      * This method allows to interrogate the engine, if a known account
      * with id @p id has a subaccount with the name @p name.
      *
      * @param id id of the account to look at
      * @param name account name that needs to be searched force
      * @retval true account with name @p name found as subaccounts
      * @retval false no subaccount present with that name
      */
    bool hasAccount(const QString& id, const QString& name) const;

    /**
      * This method is used to retrieve the list of all reports
      * known to the engine.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @return QList of all MyMoneyReport objects.
      */
    QList<MyMoneyReport> reportList() const;

    /**
      * Adds a report to the file-global institution pool. A
      * respective report-ID will be generated for this object.
      * The ID is stored as QString in the object passed as argument.
      *
      * An exception will be thrown upon error conditions.
      *
      * @param report The complete report information in a
      *        MyMoneyReport object
      */
    void addReport(MyMoneyReport& report);

    /**
      * Modifies an already existing report in the file global
      * report pool.
      *
      * An exception will be thrown upon error conditions.
      *
      * @param report The complete new report information
      */
    void modifyReport(const MyMoneyReport& report);

    /**
      * This method returns the number of reports currently known to file
      * in the range 0..MAXUINT
      *
      * @return number of reports known to file
      */
    unsigned countReports() const;

    /**
      * This method is used to retrieve a single MyMoneyReport object.
      * The id of the object must be supplied in the parameter @p id.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param id QString containing the id of the MyMoneyReport object
      * @return MyMoneyReport object
      */
    MyMoneyReport report(const QString& id) const;

    /**
      * This method is used to remove an existing MyMoneyReport object
      * from the engine. The id attribute of the object must be set.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param report const reference to the MyMoneyReport object to be updated
      */
    void removeReport(const MyMoneyReport& report);

    /**
      * This method is used to retrieve the list of all budgets
      * known to the engine.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @return QList of all MyMoneyBudget objects.
      */
    QList<MyMoneyBudget> budgetList() const;

    /**
      * Adds a budget to the file-global institution pool. A
      * respective budget-ID will be generated for this object.
      * The ID is stored as QString in the object passed as argument.
      *
      * An exception will be thrown upon error conditions.
      *
      * @param budget The complete budget information in a
      *        MyMoneyBudget object
      */
    void addBudget(MyMoneyBudget &budget);


    /**
      * This method is used to retrieve the id to a corresponding
      * name of a budget.
      * An exception will be thrown upon error conditions.
      *
      * @param budget QString reference to name of budget
      *
      * @return MyMoneyBudget reference to object of budget
      */
    MyMoneyBudget budgetByName(const QString& budget) const;


    /**
      * Modifies an already existing budget in the file global
      * budget pool.
      *
      * An exception will be thrown upon error conditions.
      *
      * @param budget The complete new budget information
      */
    void modifyBudget(const MyMoneyBudget& budget);

    /**
      * This method returns the number of budgets currently known to file
      * in the range 0..MAXUINT
      *
      * @return number of budgets known to file
      */
    unsigned countBudgets() const;

    /**
      * This method is used to retrieve a single MyMoneyBudget object.
      * The id of the object must be supplied in the parameter @p id.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param id QString containing the id of the MyMoneyBudget object
      * @return MyMoneyBudget object
      */
    MyMoneyBudget budget(const QString& id) const;

    /**
      * This method is used to remove an existing MyMoneyBudget object
      * from the engine. The id attribute of the object must be set.
      *
      * An exception will be thrown upon erroneous situations.
      *
      * @param budget const reference to the MyMoneyBudget object to be updated
      */
    void removeBudget(const MyMoneyBudget& budget);

    /**
      * This method is used to add a VAT split to a transaction.
      *
      * @param transaction reference to the transaction
      * @param account reference to the account
      * @param category reference to the category
      * @param amount reference to the amount of the VAT split
      *
      * @return true if a VAT split has been added
      */
    bool addVATSplit(MyMoneyTransaction& transaction, const MyMoneyAccount& account, const MyMoneyAccount& category, const MyMoneyMoney& amount) const;

    /**
      * This method checks if the @a transaction has two or three splits and
      * one references an asset or liability, one references an income or expense and one
      * references a tax account. All three accounts must be denominated in the same
      * transaction.commodity(). Also, if there is a tax split it must reference the
      * same account as the one that is assigned to the income/expense category.
      *
      * If that all matches, the @a transaction is updated such that the amount
      * of the asset/liability is split according to the tax settings.
      *
      * @param transaction reference to the transaction
      */
    void updateVAT(MyMoneyTransaction& transaction) const;

    /**
      * This method checks, if the given @p object is referenced
      * by another engine object.
      *
      * @param obj const reference to object to be checked
      * @param skipCheck QBitArray with eStorage::Reference bits set for which
      *                  the check should be skipped
      *
      * @retval false @p object is not referenced
      * @retval true @p institution is referenced
      */
    bool isReferenced(const MyMoneyObject& obj, const QBitArray& skipCheck) const;
    bool isReferenced(const MyMoneyObject& obj) const;

    bool isReferenced(const QString& id, const QBitArray& skipCheck) const;
    bool isReferenced(const QString& id) const;

    /**
     * This method returns the set of ids that are referenced by
     * other objects in all of the data objects.
     *
     * @returns QSet<QString> of referenced objects
     */
    QSet<QString> referencedObjects() const;

    /**
      * Returns true if any of the accounts referenced by the splits
      * of transaction @a t is closed.
      */
    bool referencesClosedAccount(const MyMoneyTransaction& t) const;

    /**
      * Returns true if the accounts referenced by the split @a s is closed.
      */
    bool referencesClosedAccount(const MyMoneySplit& s) const;

    /**
      * This method checks if the given check no &p no is used in
      * a transaction referencing account &p accId. If  @p accId is empty,
      * @p false is returned.
      *
      * @param accId id of account to checked
      * @param no check number to be verified if used or not
      * @retval false @p no is not in use
      * @retval true @p no is already assigned
      */
    bool checkNoUsed(const QString& accId, const QString& no) const;

    /**
      * This method returns the highest assigned check no for
      * account @p accId.
      *
      * @param accId id of account to be scanned
      * @return highest check no. used
      */
    QString highestCheckNo(const QString& accId) const;


    /**
      * This method checks if there is a transaction
      * after the date @p date for account @p accId.
      *
      * @param accId id of account to be scanned
      * @param date date to compare with
      * @retval false if there is no transaction after @p date
      * @retval true if there is a transaction after @p date
      */
    bool hasNewerTransaction(const QString& accId, const QDate& date) const;


    /**
      * Clear all internal caches (used internally for performance measurements)
      */
    void clearCache();

    void forceDataChanged();

    /**
      * This returns @p true if file and online balance of a specific
      * @p account are matching. Returns false if there is no online balance.
      *
      * @param account @p account to be checked
      * @retval false if @p account has balance mismatch or if there is no online balance.
      * @retval true if @p account has matching balances
      */
    bool hasMatchingOnlineBalance(const MyMoneyAccount& account) const;

    /**
      * This returns the number of transactions of a specific reconciliation state @p state of account with id @p accId.
      *
      * @param accId @p accId is the account id of account to be checked
      * @param state @p state reconciliation state
      * @return number of transactions with state @p state
      */
    int countTransactionsWithSpecificReconciliationState(const QString& accId, eMyMoney::TransactionFilter::State state) const;
    QMap< QString, QVector<int> > countTransactionsWithSpecificReconciliationState() const;

    /**
     * @brief Saves a new onlineJob
     * @param job you stay owner of the object (a copy will be created)
     */
    void addOnlineJob(onlineJob& job);

    /**
     * @brief Saves a onlineJob
     * @param job you stay owner of the object (a copy will be created)
     */
    void modifyOnlineJob(const onlineJob job);

    /**
     * @brief Returns onlineJob identified by jobId
     * @param jobId
     * @return
     */
    onlineJob getOnlineJob(const QString &jobId) const;

    /**
     * @brief Returns all onlineJobs
     * @return all online jobs, caller gains ownership
     */
    QList<onlineJob> onlineJobList() const;

    /**
     * @brief Returns the number of onlineJobs
     */
    int countOnlineJobs() const;

    /**
     * @brief Remove onlineJob
     *
     * @note Removing an onlineJob fails if it is locked
     */
    void removeOnlineJob(const onlineJob& job);

    /**
     * @brief Removes multiple onlineJobs by id
     *
     * @note Removing an onlineJob fails if it is locked
     */
    void removeOnlineJob(const QStringList onlineJobIds);

    /**
     * mark all models as clean
     */
    void fileSaved();

    /**
     * This returns the string for specific parameters
     */
    const QString& fixedKey(FixedKey key) const;

    QUndoStack* undoStack() const;

    bool hasValidId (const MyMoneyAccount& acc) const;
    bool hasValidId (const MyMoneyPayee& payee) const;

protected:
    /**
      * This is the constructor for a new empty file description
      */
    MyMoneyFile();

protected Q_SLOTS:
    void finalizeFileOpen();

    void reloadSpecialDates();

Q_SIGNALS:
    /**
     * This signal is emitted when a transaction has been committed and
     * the notifications are about to be sent out.
     */
    void beginChangeNotification();

    /**
     * This signal is emitted when a transaction has been committed and
     * all notifications have been sent out.
     */
    void endChangeNotification();

    /**
      * This signal is emitted whenever any data has been changed in the engine
      * via any of the methods of this object
      */
    void dataChanged();

    /**
      * This signal is emitted by the engine whenever a new object
      * had been added. The data for the new object is contained in
      * @a obj.
      */
    void objectAdded(eMyMoney::File::Object objType, const QString& id);

    /**
      * This signal is emitted by the engine whenever an object
      * had been removed.
      *
      * @note: The data contained in @a obj is only for reference
      * purposes and should not be used to call any MyMoneyFile
      * method anymore as the object is already deleted in the storage
      * when the signal is emitted.
      */
    void objectRemoved(eMyMoney::File::Object objType, const QString& id);

    /**
      * This signal is emitted by the engine whenever an object
      * had been changed. The new state of the object is contained
      * in @a obj.
      */
    void objectModified(eMyMoney::File::Object objType, const QString& id);

    /**
      * This signal is emitted by the engine whenever the balance
      * of an account had been changed by adding, modifying or
      * removing transactions from the MyMoneyFile object.
      */
    void balanceChanged(const MyMoneyAccount& acc);

    /**
      * This signal is emitted by the engine whenever the value
      * of an account had been changed by adding or removing
      * prices from the MyMoneyFile object.
      */
    void valueChanged(const MyMoneyAccount& acc);

    /**
     * This signal is emitted once all data of a new backend is loaded.
     */
    void modelsLoaded();

    /**
     * This signal is emitted once all data of a new backend is ready to be used.
     * The difference to modelsLoaded() is that some internal fixes can be applied
     * in the meantime. Right before this signal is sent out, the dirty flag of all
     * models will be reset.
     */
    void modelsReadyToUse();

private:
    MyMoneyFile& operator=(MyMoneyFile&); // not allowed for singleton
    MyMoneyFile(const MyMoneyFile&);      // not allowed for singleton

    QString locateSubAccount(const MyMoneyAccount& base, const QString& category) const;

    void ensureDefaultCurrency(MyMoneyAccount& acc) const;

    void warningMissingRate(const QString& fromId, const QString& toId) const;

    /**
      * This method creates an opening balances account. The name is constructed
      * using MyMoneyFile::openingBalancesPrefix() and appending " (xxx)" in
      * case the @p security is not the baseCurrency(). The account created
      * will be a sub-account of the standard equity account provided by equity().
      *
      * @param security Security for which the account is searched
      */
    MyMoneyAccount createOpeningBalanceAccount(const MyMoneySecurity& security);

    MyMoneyAccount openingBalanceAccount_internal(const MyMoneySecurity& security) const;

    /**
     * Make sure that the splits value has the precision of the corresponding account
     */
    void fixSplitPrecision(MyMoneyTransaction& t) const;

private:
    /// \internal d-pointer class.
    class Private;
    /// \internal d-pointer instance.
    Private* const d;
};

class MyMoneyFileTransactionPrivate;
class KMM_MYMONEY_EXPORT MyMoneyFileTransaction
{
    Q_DISABLE_COPY(MyMoneyFileTransaction)

public:
    MyMoneyFileTransaction();
    ~MyMoneyFileTransaction();

    /**
     * Commit the current transaction.
     *
     * @warning Make sure not to use any variable that might have been altered by
     *          the transaction. Please keep in mind, that changing transactions
     *          can also affect account objects. If you still need those variables
     *          just reload them from the engine.
     */
    void commit();
    void rollback();
    void restart();

private:
    MyMoneyFileTransactionPrivate * const d_ptr;
    Q_DECLARE_PRIVATE(MyMoneyFileTransaction)
};

#endif

